From lang at unb.ca Wed May 30 05:44:04 2012 From: lang at unb.ca (Richard B. Langley) Date: Wed, 30 May 2012 09:44:04 -0300 Subject: [IGSMAIL-6598] UNB Launches Atmospheric Correction Service for Space Geodesy Applications Message-ID: Author: Richard Langley The Department of Geodesy and Geomatics Engineering at the University of New Brunswick announces the launch of the UNB Vienna Mapping Function (UNB-VMF1) Service. This service provides geodetic-quality corrections to the signal propagation delays caused by the troposphere? the lowest-most portion of the Earth?s atmosphere?that are experienced by radio-based space-geodetic techniques such as GPS, other global navigation satellite systems, and very long baseline interferometry. Although conventional procedures exist for modeling tropospheric delays, the new service promises corrections that approach one centimeter in accuracy by mathematically tracing the path of the radio signals through numerical weather models. The service is based on the Vienna Mapping Functions developed by the Institute of Geodesy and Geophysics at the Vienna University of Technology. While tropospheric delay corrections using the mapping functions together with data from the European Centre for Medium-Range Weather Forecasts are already available, UNB will offer an alternative service with some distinctive advantages. More information is available here: http://gge.unb.ca/News/2012/2012.html#UNBVMF1 and here: http://unb-vmf1.gge.unb.ca/ ----------------------------------------------------------------------------- | Richard B. Langley E-mail: lang at unb.ca | | Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ | | Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | | Fredericton? Where's that? See: http:// www.fredericton.ca/ | -----------------------------------------------------------------------------